Differential D3043 Diff 7944 lib/libc/secure/secure_common.c

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lib/libc/secure/secure_common.c

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				/* $NetBSD: stack_protector.c,v 1.4 2006/11/22 17:23:25 christos Exp $ */
				/* $OpenBSD: stack_protector.c,v 1.10 2006/03/31 05:34:44 deraadt Exp $ */
				/*
				* Copyright (c) 2002 Hiroaki Etoh, Federico G. Schwindt, and Miodrag Vallat.
				* All rights reserved.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
				* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
				* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
				* DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
				* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
				* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
				* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
				* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
				* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
				* POSSIBILITY OF SUCH DAMAGE.
				*
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <sys/param.h>
				#include <sys/sysctl.h>
				#include <sys/types.h>
				#include <errno.h>
				#include <link.h>
				#include <signal.h>
				#include <string.h>
				#include <syslog.h>
				#include <unistd.h>
				jillesUnsubmitted Done Inline Actions Please place `#include "namespace.h"` and `#include "un-namespace.h"` around the other includes (except `libc_private.h` which should go after). You will need to use the _ versions of some functions. This reduces possible interposition and PLT usage in this function. jilles: Please place `#include "namespace.h"` and `#include "un-namespace.h"` around the other includes…
				opAuthorUnsubmitted Not Done Inline Actions If I'm not wrong, all of the newly added c files needs these changes. op: If I'm not wrong, all of the newly added c files needs these changes.
				#include "libc_private.h"

				static void __fail(const char *) __dead2;

				pfgUnsubmitted Done Inline Actions __dead2 ? pfg: __dead2 ?
				/ARGSUSED/
				static void
				__fail(const char *msg)
				{
				struct sigaction sa;
				sigset_t mask;

				/* Immediately block all signal handlers from running code */
				(void)sigfillset(&mask);
				(void)sigdelset(&mask, SIGABRT);
				(void)sigprocmask(SIG_BLOCK, &mask, NULL);

				/* This may fail on a chroot jail... */
				syslog(LOG_CRIT, "%s", msg);

				(void)memset(&sa, 0, sizeof(sa));
				(void)sigemptyset(&sa.sa_mask);
				sa.sa_flags = 0;
				sa.sa_handler = SIG_DFL;
				(void)sigaction(SIGABRT, &sa, NULL);
				(void)kill(getpid(), SIGABRT);
				_exit(127);
				}

				void
				__secure_fail(const char *msg)
				{

				__fail(msg);
				}